Abstract: A high-voltage electric cable termination comprises a cable having a conductive central core terminating ia a bared end, a semiconductive substance covering the core, an insulative envelope, and an equipotential screen and a protective outer sheath that are terminated at a distance from the end of the cable to bare a predetermined length of the insulative envelope. At least one layer of high permittivity material extends over at least part of the length of the bared insulative envelope. An outer protective tube of insulative material extends over substantially all of the length of the termination. A set of stiffener rods of an insulative composite material inside the tube extend parallel to the axis of the termination. A filler material intimately fills the spaces between the rods and between the high permittivity material layer and the tube.

Abstract: The invention relates to electrical insulators having increased resistance to partial discharges and electrical equipment comprising such electrical insulators.These electrical insulators are formed of a macromolecular material in which is incorporated a chelate which is a derivative of an organic compound of general formula: ##STR1## wherein: R is CH.sub.2 COOM or --OH,M is Na or H,x is an integer from 1 to 4,n is an integer from 0 to 4,the metal chelate being present in the material in an amount sufficient for promoting the extinction of partial discharges, said amount not exceeding a value which would alter the physical properties of the insulator such as the volume resistivity thereof.

Abstract: The invention relates to electrical insulators having increased resistance to partial discharges and electrical equipment comprising such electrical insulators.These electrical insulators are formed of a macromolecular material in which is incorporated a chelate of general formula: ##STR1## wherein: R.sub.1, R.sub.2 and R.sub.3 each represent hydrogen or a alkyl, aryl, or cycloalkyl group or a heterocyclic group containing a sulphur, oxygen or nitrogen atom, whereby said group or heterocyclic group may be substituted by one or more halogen atoms;X and Y represent oxygen or sulphur;The total number of carbon atoms in the metal chelate is between 5 and 25;M.sup.n+ stands for a metal ion, andN is an integer from 1 to 4, this enolate or thioenolate being present in said insulating material in a sufficient amount for promoting extinction of partial discharges, said amount not exceeding a value which would substantially alter the physical properties of the insulator, such as its volume resistivity.